In previous years we've had problems with the the refs up in Scotland and ended most games with a player thrown out. Wouldn't surprise me if G told them not to react.
From that fan video, the refs arm goes up quickly and to be fair to Lord he is trying to fight him back. As soon as he cross checked him they knew Nickerson was going to be chucked out, and he is their only tough guy. No point in getting anyone else getting thrown out, especially as the resulting powerplay won us the game.